Nut-lock



- UNrTnn STATES PATENT th rties.

JOSEPH O. BLAKNE Y,

OF BENTON, M AINE.

NUT-LOCK:

SPECIFICATION forming part of Letters Patent No. 372,739, dated November8, 1887.

Application filed August 27, 18S7. Serial No, 245,037. (No model.)

13 To all whom it mayconcern.-

Be itknown that I, JosnrH O. BLAKNEY, of Benton, in the county ofKennebec, State of Maine, have inventeda certain new and usefuLImprovement in Nut-Locks, of which the following is a descriptionsufficiently full, clear, and exact to enable any person skilled in theart or science to which said invention appertains to make and use thesame, reference be ing had to the accompanying drawings, forming part ofthis specification, in which Figure 1 is a side elevation showing myimproved nut-lock in use; Fig. 2, a top plan view of the same; Fig. 3, aside elevation of the lockingbar detached, and Fig. 4 a perspective viewof the washer and the plate on which it rests.

Likeletters of reference indicate corresponding parts in the differentfigures of the drawings.

My invention relates to that class of nut locks which are provided withmeans for unlocking without injury to the parts; and it consists in anovel construction and arrangement of parts, as hereinafter more fullyset forth and claimed, the object being to produce a simpler, cheaper,and more efi'ect-ive device ofthis character than is now in ordinaryuse.

The nature and operation of the improvement will be readily understoodby all conversant with such matters from the following explanation.

In the drawings, A represents the screwbolt, 13 the nut, G the washer,and D the lockingbar. The bolt and nut are of the ordinary form andconstruction. The washer is provided with a central hole, on, forreceiving the bolt A, and with a groove, f, in its upper side forreeeivingthelocking-bar D. Thclocking bar is of suitable size to fitinto the groovef when in use, and is provided at its inner end with adownwardly-projccting arm, t, which is inserted in a vertically'arrangedhole, 15, formed in the washer O at theinnerend of the groovef.

Hinged to the outer end of the locking-bar, as shown at z in Fig. 2,there is a latch, is, provided with a lip or flange, 7", at its outerend, which rests in a recess, 1), in the upper side of said bar, saidflange being flush with the top of the bar when it is closed to lock thenut. The washer C is also provided on its under side with atransverselyarranged downwardly-projectiug wedge-shaped flange, 3 whichrests in a corresponding groove, w, in the plate or bar 13,011 which thewasher rests when in use. 7

\Vhen the washer is used with the fishplate in connecting the adjacentends of two railway-rails, the groove to is usually formed on saidplate, but may be formed in a plate or bar resting on the fish-plate, ifpreferred.

In the use of my improvement the flange y.

of the washer O is placed in the groove 10 of the plate or bar E and thebolt A inserted in the bolt-holes m. "he locking-bar D is then placed inthe groovef of the washer 0, its arm t being inserted in the hole t andthe latch elevated, as shown in Fig. 3. The nut B is then turned ontothe bolt, and when it comes into forcible contact with the top of thewasher the latch 7c is turned down into a horizontal position, with itsflange 1' resting in the recess 22, after which the nut is turnedbackward slightly until its corner 1) passes over said flange andstrikes the shoulder d on the latch 7t, thereby looking it in a mannerwhich will be readily obvious without a more explicit description.

\Vhenever it is necessary to remove the nut,

it is turned onto the bolt Aslightly or until its So corner 1) passesfrom over the flange r on the latch 7;, after which said latch iselevated, as shown in Fig. 3, thereby permitting the nut to be removedfrom the bolt.

' The groove 10 in the plate E and flange g on the washer prevent thewasher from revolving when the nut is turned in either direction, andhence assist in preventing the accidental unscrewing of the nut from thebolt.

It will be obvious that when the nut is turned backward slightly overthe flange r, resting in therecess '0, the latch k will thereby belocked in its depressed position and the shoulder d kept against thenut.

I do not confine myself to constructing the bar 1) with the recess a, asthe body of said bar may be of such diameter or the groovef of suchdepth as to permit the corner b of the nut to pass onto said flangewithout said recess. Theholet may also pass entirely through the washerC, if desired, and the arm 5 of the bar D be elongated and inserted in ahole in the plateE, thus obviating the necessity of using the groovewand flangeyto prevent the washer from turning.

Having thus explained my invention, what I claim is 1. In a nut'lock ofthe character described, the combination of the followinginstrumentalities, to wit: a screw-bolt, a nut for said bolt, a washerprovided with a bolt-hole near its center, a groove in its upper side, avertically-arranged hole connected with said groove, and a flange on itslower side, a plate provided with a bolt-hole and agroove adapted toreceive the flange on said'washer, and a locking-bar adapted to rest insaid groove in the washer when the nut is in position on the bolt, saidbar beingprovided at its inner end with an arm adapted to enterthe;vertical hole in the waslier and at its outer end with 'a hingedlatch adapted to be turned down against the nut and keep it fromaccidentally escaping from the bolt, substantially as described.

, 2. In a device .of the character described,

